This is an app to calculate the very disgusting calculation for travels.
Imagine you travel with your friends.
There are many events during the travel.
Driving, BBQ, getting trains, having dinner, watch shows, etc.
At the each event, you or your friends may pay all the money your party used. Some may not drink alcohol when others drink.
This app calculate such complicated calculation of the sum, and you can settle up all the money later.
"Warikan" is Japanese word that represents to split costs someone have already payed.